1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d2e3c3e3f9c9..69bc0d888c01 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -247,6 +247,7 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
 static struct acpi_device *acpi_companion_match(const struct device *dev)
 {
         struct acpi_device *adev;
+        struct mutex *physical_node_lock;
 
         adev = ACPI_COMPANION(dev);
         if (!adev)
@@ -255,7 +256,8 @@ static struct acpi_device *acpi_companion_match(const struct device *dev)
         if (list_empty(&adev->pnp.ids))
                 return NULL;
 
-        mutex_lock(&adev->physical_node_lock);
+        physical_node_lock = &adev->physical_node_lock;
+        mutex_lock(physical_node_lock);
         if (list_empty(&adev->physical_node_list)) {
                 adev = NULL;
         } else {
@@ -266,7 +268,7 @@ static struct acpi_device *acpi_companion_match(const struct device *dev)
                 if (node->dev != dev)
                         adev = NULL;
         }
-        mutex_unlock(&adev->physical_node_lock);
+        mutex_unlock(physical_node_lock);
 
         return adev;
 }